Bio-Optical Response and Coupling with Physical Processes in the Lombok Strait Region

As part of the bio-optics portion of the PhilEx RIOP08 efforts during the Feb 6-28 cruise, a variety of in-line
instrumentation was used to continuously analyze surface waters from the R/V Melville's uncontaminated seawater
supply. These instruments monitored particle near-forward volume scattering function, particle beam attenuation
and absorption spectra, particle backscattering, as well as chlorophyll and CDOM fluorescence.
The specific instruments used were:

All instruments were operated with continuous flow. A custom chamber to house the BB-3 was designed and built by
Giorgio Dall'Olmo (Oregon State University) and is described in Slade et al. (in prep). Sample seawater was also
diverted for ten minutes per hour through a filter (GE Osmonics Memtrex, 0.2 micron) in order to provide filtered
seawater blanks. For example, these blanks can be used to estimate calibration independent particle optical
properties with the AC-S, and to compensate for drift in the chlorophyll fluorometer due to fouling between
cleanings (Slade et al. in prep).

An ocean color Hyperspectral Surface Acquisition System (HyperSAS, Satlantic) was also used during this cruise.
The system consists of two hyperspectral radiance sensor and one hyperspectral irradiance sensor. The radiance
sensors were mounted on a frame on the bow to allow simultaneous viewing of sky and sea surface. The irradiance
sensor was mounted on the 03 level to capture sky irradiance. The output product of the HyperSAS system is
hyperspectral remote-sensing reflectance from 400 to 800 nm.